Re: Reading /dev/mem by dd

[Nameer Yarkon]

On Tue, Feb 16, 2010 at 10:41 AM, Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:
> Modern X does it through kernel modules (DRM, GEM etc.)

is it done by an mmap call (to the device) ?

> One reason it's needed to do it this way is IOMMUs.

why would it care about IOMMUs ? do graphic cards manipulate the memory too ?

thank you!

>
> -Andi
>
> --
> ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/